Dell Optiplex 7070 Small Form Factor Service Manual page 71

Table 3. Power LED summary
Amber LED state
Off
Off
Previous State
Blinking
Steady
Off
Table 4. Amber LED blinking failures
Amber LED state
2
2
2
2
White LED state
Off
Blinking
Previous State
Off
Off
Steady
White LED state
1
2
3
4
System state
S4, S5
S1, S3
S3, no PWRGD_PS
S0, no PWRGD_PS
S0, no PWRGD_PS, Code fetch
= 0
S0, no PWRGD_PS, Code fetch
= 1
System state
Bad MBD
Bad MB, PSU or cabling
Bad MBD, DIMMS, or CPU
Bad coin cell
Notes
• Hibernate or Suspend to Disk
(S4)
• Power is off (S5)
System is in a low power state,
either S1 or S3. This does not
indicate a fault condition.
This entry provides for the
possibility of a delay from
SLP_S3# active to PWRGD_PS
inactive.
Boot Failure - The computer is
receiving electrical power, and
power supplied by the power
supply is normal. A device might
be malfunctioning or incorrectly
installed. Refer to the table
below for Amber Blinking Pattern
diagnostics suggestion and
possible failures.
Boot Failure - This is a system
fault error condition, including
the power supply. Only the
+5VSB rail on the power supply
is working correctly.
This indicates that the host BIOS
has started to execute and the
LED register is now writable.
Notes
Bad MBD - Rows A, G, H, and J
from table 12.4 of SIO Spec -
Pre-Post indicators [40]
Bad MBD, PSU or PSU cabling -
Rows B, C and D of table 12.4
SIO spec [40]
Bad MBD, DIMMS or CPU -
Rows F and K from table 12.4 of
SIO spec [40]
Bad coin cell - Row M of table
12.4 in SIO spec [40]
Troubleshooting 71